Mains-independent, battery-operated electronic room temperature controller with PID output control. The desired temperature is set using the large setpoint knob on the front of the housing. , - Easy operation via large rotary knob and large display , - For heating or cooling , - Color of housing front: Signal white RAL9003 , - Color of mounting plate: Light gray RAL7035 , - 2 x alkaline batteries type AA, 1.5 V included